B01D 2321/168
Use of other chemical agents
B01D2321/168 (Use of other chemical agents) appears on 261 US grants and 356 published applications in this corpus.
Search patents in B01D- Granted patents
- 261
- Published applications
- 356
- Assignees
- 214
- Inventors
- 933
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 1 | 0 |
| 1999 | 9 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 5 |
| 2002 | 4 | 6 |
| 2003 | 5 | 7 |
| 2004 | 6 | 19 |
| 2005 | 4 | 10 |
| 2006 | 8 | 19 |
| 2007 | 5 | 17 |
| 2008 | 1 | 14 |
| 2009 | 6 | 14 |
| 2010 | 7 | 20 |
| 2011 | 11 | 11 |
| 2012 | 5 | 15 |
| 2013 | 10 | 12 |
| 2014 | 2 | 12 |
| 2015 | 11 | 19 |
| 2016 | 10 | 13 |
| 2017 | 7 | 18 |
| 2018 | 7 | 12 |
| 2019 | 13 | 15 |
| 2020 | 10 | 13 |
| 2021 | 6 | 21 |
| 2022 | 12 | 15 |
| 2023 | 11 | 12 |
| 2024 | 11 | 6 |
| 2025 | 3 | 16 |
| 2026 | 6 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for operating reverse osmosis membrane device, a slime control method, and a water treatment device16 Jun 2026US 12,655,041 B2Kurita Water Industries Ltd.
- Method of cleaning a fouled reverse osmosis membrane12 May 2026US 12,623,171 B1King Fahd University of Petroleum and Minerals
- Membrane separation method21 Apr 2026US 12,606,464 B2Kurita Water Industries Ltd.
- Chemical product comprising an anionic surfactant, chelant, and enzyme, and process for cleaning nanofiltration and reverse osmosis membranes7 Apr 2026US 12,595,436 B2Petroleo Brasileiro S.A. - Petrobras
- Methods for treating porous membranes24 Mar 2026US 12,582,944 B2Apache Corporation
- Ultra-low power membrane-assisted lithium extraction system with passive foulant removal24 Sep 2026US 2026/0284598 A1Lyten, Inc.
- Control device, control method, and control program20 Aug 2026US 2026/0242254 A1Yokogawa Electric Corporation
- Integrated pre-filter for uf/mf membrane system30 Jul 2026US 2026/0216654 A1
- Systems, kits, and methods for preventing membrane fouling30 Jul 2026US 2026/0216656 A1
- Polyimide Membranes with Tunable Functionalization for Selective Removal of Per- and Polyfluoroalkyl Substances (PFAS)23 Jul 2026US 2026/0208122 A1Polykala Technologies, LLC
Most cited
By later US patents
- Hemofiltration and plasmafiltration devices and methods308US 5,919,369 AHemocleanse, Inc. · 1999
- Installation for making water potable with submerged filtering membranes156US 5,607,593 AOTV Omnium De Trajtements et de Valorisation S.A. · 1997
- In situ cleaning system for fouled membranes133US 5,403,479 AZenon Environmental Inc. · 1995
- Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly110US 6,280,626 B1Mitshubishi Rayon Engineering Co., Ltd. · 2001
- Liquid purification using reverse osmosis hollow fibers107US 4,414,113 AEcodyne Corporation · 1983